Bristol's a thoroughly interesting city, in my opinion, even as someone who admittedly hasn't spent too much time in Bristol city centre itself beyond Cribbs Causeway (My mum always took us to The Mall at Cribbs Causeway, the South West's largest shopping centre in case you're wondering, a fair amount when we were kids, and Cribbs was also where we always used to go to the cinema. I'll digress that I haven't actually been post-COVID, however... I'm not much of a shopper myself.).
We used Bristol as a case study a fair amount in GCSE Geography, and we actually did our urban fieldwork down at the waterfront in Year 11.
Geography taught me a fair amount about Bristol, and it's a very interesting place indeed... as
@Matt.GC said, it's an incredibly diverse and multicultural city, particularly around areas such as St Paul's (from memory, I think the percentage who aren't White British in St Paul's was something like 40%... I could be wrong there, though, as GCSE Geography was a good 3 years ago now), and in an interesting trend, its population seems to be getting younger, in stark contrast to the aging population in the rest of the UK. In a rather happy fact, Bristol was also voted the nicest city in Britain to live in, apparently!
From my own (admittedly somewhat limited) experiences, Bristol is a nice city; it all seems fairly modern and fresh, with lots to do, and there's also a surprising amount of history, too!